A trust created by an employer as part of a stock bonus, pension, disability, death benefit or profit-sharing plan for the benefit of some or all employees, to which contributions are made by the employer or employees or both, for the purpose of distributing to the employees the earnings or the principal, or both earnings and principal, of the fund held in trust, shall not be deemed to be invalid as violating any existing law or rule of law against perpetuities or suspension of the power of alienation of the title to property. A trust created for such purpose may continue for such time as may be necessary to accomplish the purposes for which it has been created. The income arising from any property held in any such trust may be permitted to accumulate in accordance with the terms of such trust and the plan of which such trust forms a part for such time as may be necessary to accomplish the purposes for which such trust has been created. Any rule of law against perpetuities or suspension of the power of alienation of the title to property shall not invalidate any such trust.